# 3913 — Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms

HS code 3913 classifies Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms. It belongs to Chapter 39 (Plastics and articles thereof) of Section VII (Plastics and articles thereof; rubber and articles thereof) of the Harmonized System.

> Section VII · Plastics and articles thereof; rubber and articles thereof
> Chapter 39 · Plastics and articles thereof

**HS code:** `3913`

## Description

Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms

## Subheadings

- `391310` — Alginic acid, its salts and esters
- `391390` — Other

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Source: https://hscode.eximagent.ai/39/3913
Last updated: 2026-06-03
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